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Full text of "Circuits"

A Simple Trip Wire 



Make] Projects 



A Simple Trip Wire 

Written By: Lewis 



TOOLS: 


PARTS: 


Scissors (1) 


AA Battery Holder (1) 


Soldering/desoldering tools (1) 


AA Battery (1) 


Wire cutter/stripper (1) 


Beeper/Buzzer (1) 




Cabled) 




Copper pins (3) 




Photo frame hook (1) 



SUMMARY 

With a few easy steps build a trip wire! 



) Make Projects 



www.makeprojects.com 



Page 1 of 4 



A Simple Trip Wire 



Step 1 — A Simple Trip Wire 




• Solder a wire to one terminal of a 
beeper or buzzer. 



Step 2 




• Put two pins or nails into a board. 

• Put in a third pin with a photo hook 
pivoting on it. Position the pin so 
that when the hook swings it will 
contact one of the other two pins. 



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Page 2 of 4 




• Solder the wire from the 
beeper/buzzer to the pin that the 
hook will touch. 

• Solder a wire from a battery pack 
to the hook. 



Step 4 




• Complete the circuit by soldering a 
wire that connects the remaining 
terminals of the battery pack and 
the beeper/buzzer. 



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Page 3 of 4 




• Tie a string to the hook. Mount the 
board on one side of a doorway or 
walkway and stretch the string 
across to the other side. 

• Now wait for someone to walk into 
your trap! 



st generated on 2012-11-03 02:55:15 AM. 



) Make Projects 



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Page 4 of 4